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Driving in the city with O/D off is no big deal. For that matter same goes for the hiway. O/D lowers the rpm you'll run at on the hiway and improves mpg.

Tow/haul is basically O/D off. When you push the Tow/Haul button making the light come on your dash, you are turning the O/D off.

__________________Brian: "A veteran - whether active duty, retired, national guard, or reserve - is someone who, at one point in his or her life, wrote a blank check made payable to The 'United States of America', for an amount of 'up to and including my life.'"

Cool, Thanks for the info, that's pretty much what I figured.... when I have the O/D on, it seems the tranny can't decide if it wants to stay in 4th or 5th gear anyways. The added throttle response is a bonus too!

Ive been meaning to ask if tow/haul is the same as o/d off my last 4.7 just had o/d off and every truck ive ever driven deff has a little more life on the low end in o/d off I also believe I pull a little better mpgs around town w o/d off or tow/haul

is it bad to drive around with the tow/haul selected if not towing? and how specifically does it work?

No it is not bad to do that. In fact some recommend it for around town driving.

It will decrease your mpg while driving on the highway though. In town no difference.

It is an electronic OD is all.

__________________Brian: "A veteran - whether active duty, retired, national guard, or reserve - is someone who, at one point in his or her life, wrote a blank check made payable to The 'United States of America', for an amount of 'up to and including my life.'"

O.K. a couple of questions about the O/D off. At what speeds are we talking about where it would help?

I do a good bit of driving on rural roads where the speed limit is 45 mph. Would this be an application for O/D off? Ocassionally, the limit will drop to 35 and sometimes go up to 55. I don't do any stop and go city driving.

At what point is it better to run with O/D on? 55 mph, 60, 65????

Also, should you be at a complete stop to switch from O/D on to O/D off? I know it can be done on the fly, but is it harmful for the tranny to be driving with O/D off at 55 mph and switch to O/D as I approach highway cruising speeds. Or vice versa... I go from 65 mph down to a 45 mph zone and switch to O/D off.